Electricity: measuring and testing – Of geophysical surface or subsurface in situ – By magnetic means
Patent
1995-12-05
1996-12-31
Snow, Walter E.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
By magnetic means
32420722, 32420726, 32420723, 175 45, 166 665, G01V 326, G01V 320, G01V 340, G01R 3304
Patent
active
055897754
ABSTRACT:
A method for determining the distance and direction from a first borehole to a second borehole includes generating, by way of a rotating magnetic field source at a first location in a second borehole, and elliptically polarized magnetic field in the region of the first borehole. First and second sensors positioned at an observation point in the first borehole measure the amplitude and relative phase of respective first and second components of the polarized magnetic field and from these measurements, the direction, relative to the sensors, from the observation point to the first location is determined. The distance between these points is determined by measuring at plural observation points amplitude variations with depth of the rotating magnetic field in the first borehole, and computing theoretical variations in the amplitude for different assumed distances between the observation points and the location of the magnetic field source. The measured amplitude variations are compared with theoretical variations to determine the distance between the first and second boreholes.
REFERENCES:
patent: 3406766 (1966-10-01), Henderson
patent: 3589454 (1971-06-01), Coyne
patent: 3731752 (1973-05-01), Schad
patent: 4072200 (1978-02-01), Morris et al.
patent: 4323848 (1982-04-01), Kuckes
patent: 4372398 (1983-02-01), Kuckes
patent: 4443762 (1984-04-01), Kuckes
patent: 4502010 (1985-02-01), Kuckes
patent: 4529939 (1985-07-01), Kuckes
patent: 4700142 (1987-10-01), Kuckes
patent: 4710708 (1987-12-01), Rorden et al.
patent: 4791373 (1988-12-01), Kuckes
patent: 4845434 (1989-07-01), Kuckes et al.
patent: 4933640 (1990-06-01), Kuckes
patent: 5014008 (1991-05-01), Flowerdew
patent: 5074365 (1991-05-01), Kuckes
patent: 5151658 (1992-09-01), Muramatsu et al.
patent: 5218301 (1993-06-01), Kuckes
Snow Walter E.
Vector Magnetics Inc.
LandOfFree
Rotating magnet for distance and direction measurements from a f does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rotating magnet for distance and direction measurements from a f, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotating magnet for distance and direction measurements from a f will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1144382